From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Letter from C.C. Wakefield & Co. detailing the results of an examination of a deposit from a gearbox.
| Identifier | ExFiles\Box 92\5\ scan0119 | |
| Date | 27th April 1937 | |
| BY APPOINTMENT Makers of the Famous "PATENT CASTROL" Motor Oils. C. C. Wakefield & Co., Limited. MANUFACTURERS OF HIGH CLASS LUBRICANTS. GOVERNING DIRECTOR, VISCOUNT WAKEFIELD OF HYTHE. MANAGING DIRECTOR, W.R.GRAHAM. DIRECTOR & SECRETARY, J.{Mr Johnson W.M.} BROWNE. TELEPHONES: CITY 4411 (10 Lines) RESEARCH DEPARTMENT. PLEASE ADDRESS YOUR REPLY TO: RESEARCH DEPARTMENT, HAYES, Middlesex. Phone: HAYES 246/8 X302 EAE/AF 27th April, 1937. Messrs. Rolls-Royce, Ltd., DERBY. For the attention of Mr. Grylls. Dear Sirs, I expressed the opinion when I saw you that I was a little doubtful whether an examination of the deposit would throw any direct light on the sludge formation in the gear box. I was inclined to the opinion that a temperature above 110°C must have been experienced, but you felt that was very unlikely. Our examination of the deposit from the Castrol Hi-Press gives the following results:- Free Oil 54.3 Organic matter sol. in benzene 1.4 " " insol. " " 37.5 Mineral matter 6.8 ----- 100.0 ===== | ||